radhoo:
Wait until I add those 3 extra sensors!! I plan to make a video outside..

jlizotte:
wow. Nicely done!

radhoo:
HEre are the other 3 ultrasonic sensors, some plastic enclosures I built for them (out of PVC pipes), white leds as frontal lights, back red positioning lights, and some pics with the final setup:

radhoo:
I finally completed this project! Demo videos below:

Last thing to build was the Ultrasonic beacon , that the user needs to hold in his/her hands - quite comfortable, it is the size of a TV remote. It is also my first SMD PCB, and can say it was a lot of fun to build. Details , pics, eagle files, here: http://www.pocketmagic.net/2013/02/android-controlled-robot-part-2/#130501

And here are two demo videos, showing the robot outdoors:
Robot Dog following me -2-